Duplex indicating device



May 26, 1931. s. R. CAVE 1,806,785

DUPLEX INDICATING DEVICE Filed Jan. 19, 1929 INV NTOR 6 rd M PatentedMay 26, 1931 UNITED STATES SYDNEY ROGER CAVE, or NEWYQRK, n. Y.

DUPLEX INDICATIKG DEVICE Application filed January 19, 1929; "Serial No.333,627,.

The device, the subject of this invention, is an indicating device,particularly adapted for indicating telephone numbers or radio stations,or any other series of characters where 6 a plurality 'of numbers or aseries of numbers and letters are required to coincide to complete anindication.

In the past, it has been customary to use what are comomnly termed logs,or boks, or cards, wherein or whereon the numbers and characters arewritten in ink or pencil, but because of the constant changes that aremade in such memoranda, the book or log becomes useless in a short time.7

An object of my invention, then, is to provide means whereby numbers orcharacters or both may be changed at'will, and may be changed withoutdestroying or making useless, any part or parts of the record device.

The following is what I consider the best means of carrying out myinvention, and the accompanying drawings should be referred to for acomplete understanding of the specification which follows.

In the drawings v Fig. 1 is a side elevation of my device, the enclosingcasing being shown in section.

Fig. 2 is a front elevation. Fig. 3 is a back elevation. Fig. 4 is aperspective view of one of the card holders.

Similar reference numerals indicate parts in all the figures where theyappear.

' At 1, I show a face plate, the bottom por- 35 tion 2 of which isturned backward to provide a stand or base or support for my device.

This face plate 1 is provided with a window 3,

and a plurality of slots 4, extending radially from a point 5, whereinis arranged a pivot for a lever 6. The lever 6 is provided with anoperating handle 7, and a pointer -8, the

pointer extending inward over the face plate 1. Arranged in each or anyof the slots 4, is

a sliding member 9, which is a card holder, and which is shown in detailin Fig. 4.

Formed integral with the face plate 1, or

the base 2, are upwardly extending members 10 and 11, which serve assupports and bear-' ings for a shaft 12, and upon the shaft 12 is a drum13 and a pin driven slotted drum or like gear 14. Formed integral orsecured to the lever 6, is a sector 15pr0vid'ed with a plural ity ofpins 16, any one of these. pins may enter a. slot 17 in. the member 14to rotate this member. The drum '13 is provided with a plurality ofslots 18,'and the drum 13. may be formed of wood, and upon the drum 13and overlapping the slots 18-, are metallic strips 19. Cards such asthose shown at 20, may be slipped into the slots 18, to be. retainedtherein by the strips 19.

In the operation of this device, one or more of the card holders shownin Fig. 4, is placed in each of the slots 4 on the face plate 2, andthereafter cards may be inserted into these card holders.

If the dial is to be used with a three-dial radio set, then the lettersindicating the stations, will be placed in the card holders, assuggested at 9, and thereafter series of cards carrying figuresindicating the dial settings, will be arranged in the slots 18 of thecylinder 13, and now when the knob 7 is rotated so as tobring thepointer 8 adjacent one of the cards in the slots 4, the proper dialsettings will appear through the window 3.

It will of course be understood that any series of letters or figures orduplex series of figures and/or letters, may be employed.

I may, if desired, enclose the back of my device as suggested by thehousing 21. I may of course increase or decrease the number of slots inboth the face plate and the drum, correspondingly changing the number ofpins in the sector 15, and the number of recesses in the gear member 14.

The blank portion of the face plate 1. under the window 8, may be usedfor advertising, or I may place thereon, alternate station readings, orother information, and other modifications may be made within the scopeofthe appended claims without departing from the principle orsacrificing the advantages of this invention.

Having carefully and fully described my invention, what I claim anddesire to secure by Letters Patent is i 1. A device of the characterdescribed comprising a plurality of movable card holders, and aplurality of stationary card holders, a

rotatable means for supporting certain of said movable card holders tocause them to correspond with the fixed position of the stationary cardholders, said means comprising a sector member and a gear and shaftoperated thereby and a drum upon said shaft.

2. An indicating device comprising a face plate, having a plurality ofslots therein, and card holders adapted to be introduced into saidslots, a ring-shaped member, a shaft for supporting said ring-shapedmember, and a plurality of pins in said ring-shaped member, a rotatableslotted member and a drum secured together, the pins in said ring-shapedmember being adapted to enter the slots in said slotted member to rotatesaid drum.

3. An indicating device having a face plate provided with a slot,movable card holders supported thereon, a drum at the back of said faceplate and adjacent thereto, a rotatable slotted member, and a rotatablering-shaped member having means for engaging said slotted member and ashaft extending through said slotted member and said drum for rotatlngsaid drum upon the movement of said r1ng-shaped member.

SYDNEY ROGER CAVE.

